diff --git a/src/pretix/base/models/base.py b/src/pretix/base/models/base.py
index e7ff15525..bdffb9d41 100644
--- a/src/pretix/base/models/base.py
+++ b/src/pretix/base/models/base.py
@@ -86,7 +86,7 @@ class LoggingMixin:
                     if (sensitivekey in k) and v:
                         data[k] = "********"
 
-            logentry.data = json.dumps(data, cls=CustomJSONEncoder)
+            logentry.data = json.dumps(data, cls=CustomJSONEncoder, sort_keys=True)
         elif data:
             raise TypeError("You should only supply dictionaries as log data.")
         if save:
diff --git a/src/pretix/base/models/orders.py b/src/pretix/base/models/orders.py
index bf4402b89..266a1c4a0 100644
--- a/src/pretix/base/models/orders.py
+++ b/src/pretix/base/models/orders.py
@@ -1185,7 +1185,7 @@ class OrderPayment(models.Model):
 
     @info_data.setter
     def info_data(self, d):
-        self.info = json.dumps(d)
+        self.info = json.dumps(d, sort_keys=True)
 
     @cached_property
     def payment_provider(self):
@@ -1543,7 +1543,7 @@ class OrderRefund(models.Model):
 
     @info_data.setter
     def info_data(self, d):
-        self.info = json.dumps(d)
+        self.info = json.dumps(d, sort_keys=True)
 
     @cached_property
     def payment_provider(self):